.sign_body {
    padding-top: 40px;
    padding-bottom: 40px;
    background-color: #eee;
}

.form-signin {
    max-width: 330px;
    padding: 15px;
    margin: 0 auto;
}

.form-margin-top {
    margin-top: 6%;
}

.form-signin .form-signin-heading, .form-signin .checkbox {
    margin-bottom: 10px;
}

.form-signin .checkbox {
    font-weight: normal;
}

.form-signin .form-control {
    position: relative;
    height: auto;
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    padding: 10px;
    font-size: 16px;
}

.form-signin .form-control:focus {
    z-index: 2;
}

.form-signin input[type="email"] {
    margin-bottom: -1px;
    border-bottom-right-radius: 0;
    border-bottom-left-radius: 0;
}

.form-signin input[type="password"] {
    margin-top: 10px;
    margin-bottom: 10px;
    border-top-left-radius: 0;
    border-top-right-radius: 0;
}

footer {
    text-align: center;
    position: absolute;
    bottom: 0;
    width: 100%;
    height: 30px;
    font-size: 13px;
    color: #777;
}

/* 扩展优化 */

.error-msg {
    text-align: center;
    width: 100%;
    color: red;
    display: block;
    margin-top: 5px;
    line-height: 25px;
}

.custom-confirm {
    padding-top: 8%;
    color: #555;
}

.custom-confirm-form {
    margin: 0px auto;
    width: 350px;
}

.username {
    margin: 0 2px;
    font-weight: 600;
    color: #5cb85c;
}

.power-list>span {
    line-height: 19px;
    height: 20px;
    margin: 5px 0;
    display: block;
}

.power-list input[type=checkbox] {
    margin-top: 0px;
    display: inline-block;
    vertical-align: middle;
}

.power-list>span label {
    margin-bottom: 0;
    margin-left: 5px;
    display: inline-block;
    vertical-align: middle;
}